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권기문(Kimun Kwon),진광희(Kwanghue Jin),이병정(Byungjeong Lee) 한국정보과학회 2015 정보과학회논문지 Vol.42 No.6
버그 정정 활동은 소프트웨어 개발과 유지보수 작업에서 많은 비중을 차지하므로, 버그 정정활동에 소요되는 시간을 미리 추정할 수 있다면 소프트웨어 프로젝트 작업 계획에 큰 도움이 될 것이다. 따라서 본 연구에서는 버그 리포트를 이용하여 버그 정정 시간을 추정하는 방법을 제안한다. 본 방법에서는 먼저, 버그 리포트가 제공하는 버그 메타 필드에 k-NN 방법을 적용하여 과거 버그 리포트들을 분류한다. 다음으로, 버그 리포트의 텍스트 정보를 활용하여 과거 버그와 새로운 버그 사이의 유사도를 계산하고, 유사한 버그의 정정 시간을 활용하여 새로운 버그의 정정 시간을 추정한다. 마지막으로, 오픈 소스 프로젝트에 본 방법을 적용한 실험을 통하여 효과적으로 버그 정정 시간을 추정한다는 것을 보인다. As fixing bugs is a large part of software development and maintenance, estimating the time to fix bugs -bug fixing time- is extremely useful when planning software projects. Therefore, in this study, we propose a way to estimate bug fixing time using bug reports. First, we classify previous bug reports with meta fields by applying a k-NN method. Next, we compute the similarity of the new bug and previous bugs by using data from bug reports. Finally, we estimate how long it will take to fix the new bug using the time it took to repair similar bugs. In this study, we perform experiments with open source software. The results of these experiments show that our approach effectively estimates the bug fixing time.
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Jungseok Choi,Kimun Kwon,Youngkyu Lee,Eunyoung Ko,Yongsun Kim,Yangil Choi 한국축산식품학회 2019 한국축산식품학회지 Vol.39 No.2
The objective of this study was to investigate slaughtering performance, carcass grade, and quantitative traits of cuts according to seasonal influence by each month in pigs slaughtered in livestock processing complex (LPC) slaughterhouse in Korea, 2017. A total of 267,990 LYD (Landrace×Yorkshire×Duroc) pig data were used in this study. Results of slaughter heads, sex distribution, carcass weight, backfat thickness, grading class, total weight, and fat and lean meat percentages of each cut predicted by Autofom Ⅲ were obtained each month. The number of slaughtered pigs was the highest in early and late fall but the lowest in midsummer. Only in midsummer that the number of females was higher than that of castrates. During 2017, carcass weight was the lowest in late summer. Backfat thickness was in the range of 21–22 mm. In mid and late spring, pigs showed high 1+ grade ratio (37.05% and 36.15%, respectively). For traits of 11 cuts predicted by Autofom Ⅲ, porkbelly showed lower total weight, lean weight, and fat weight in midsummer to early fall but higher lean meat percentage compared to other seasons. Weights of deboned neck, loin, and lean meat were the highest in midfall compared to other seasons (p<0.05). In conclusion, characteristics of slaughtering, grading, and economic traits of pigs seemed to be highly seasonal. They were influenced by seasons. Results of this study could be used as basic data to develop seasonal specified management ways to improve pork production.
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이현철(Lee, Hyunchol),권기문(Kwon, Kimun),조영훈(Jo, Yeonghun) 한국방재학회 2017 한국방재학회논문집 Vol.17 No.3
암반사면을 안전하고 효과적으로 해석하기 위해서 암반의 역학적 특성을 면밀하게 조사해야 한다. 하지만 클리노미터를 사용한 절리조사의 한계점으로 인해 이를 보완한 새로운 측정법의 연구가 필요하다. 본 연구에서는 절리방향의 기하학적 특성을 분석하기 위해 절리의 방향성을 현장에 효율적으로 적용할 수 있는 절리조사 시스템을 개발하였다. 개발된 시스템은 하드웨어와 해석 소프트웨어로 구분된다. 하드웨어는 암반 절리 방향성을 측정하는 측정모듈, 측정자료를 전송하는 전송모듈로 구성되었다. 소프트웨어는 측정모듈을 통해 얻은 자료로부터 절리의 방향성을 분석하기 위해 개발하였으며 Arduino Joint Orientation Survey System로 명명하였다. 개발된 시스템을 접근이 어려운 지역 등 조사자가 측정할 수 없는 경우의 현장적용성이 뛰어나며 실내시험결과인 절리의 방향성을 효과적으로 분석할 수 있었다. Mechanical Properties of rock to Rock Slope as a safe and effective interpretation should be thoroughly investigated. Clinometer, however, new complements this new measurement due to the restrictions of the research for the joint is needed. In this study, geometric characteristics of the joint orientation to analyze the joint orientation of efficiently developing a joint survey system that can be applied to the field. The system is developed and Analysis software to hardware. Hardware is bedrock to measure the joint orientation of measuring module, measuring the transfer of data transfer module. From the software is measuring module from the data to analyze the orientation of the joint development, and arduino joint orientation survey system named. Can not be measured by the investigation, including regional development approach is a system that has been difficult if the Field Application of the lab test results of the joint orientation and effectively.
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Yeongkwon Yun,Boin Lee,Kimun Kwon,Sejoo Kang,Eunmi Oh,Young Min Choi 한국축산식품학회 2020 한국축산식품학회지 Vol.40 No.1
The objectives of this study was to compare palatability changes of the longissimus thoracis (LT) and vastus lateralis (VL) muscles of Hanwoo steers from different beef quality grades (1+ and 1) during 28 d of wet-aging in order to improve the utilization of the VL muscle as a steak. The VL muscle showed a higher collagen content and a lower intramuscular fat content than the LT muscle (p<0.05). As expected, the Warner-Bratzler shear force value was greater in the LT 1 grade (LT-1) muscle than the LT-1+ muscle (p<0.05); whereas no difference was observed between the grades in the VL muscle at 24 h postmortem. Compared to 0 d of aging, tenderness scores significantly increased after 14 and 21 d of aging in the LT and VL muscles, respectively (p<0.05). Additionally, there was no difference in tenderness score between the VL-1+ aged for 21 d and the LT-1 at 24 h postmortem, although tenderness score was greater in the LT than the VL at each period (p<0.05). Moreover, the VL-1+ steak exhibited a higher tenderness score than the VL-1 steak at 21 and 28 d of aging (p<0.05). On the other hand, the effect of aging time on juiciness and flavor in the VL muscle was somewhat limited unlike the LT muscle. Taken together, the VL muscle requires a longer aging time than the LT muscle to improve consumer preference. Considering the tenderness, using a higher quality grade for aging is more useful in the VL muscle.
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